centenary

centenarycen‧te‧na‧ry /senˈtiːnəri $ -ˈten-, ˈsentəneri/ noun (plural centenaries) especially British English (also centennial /senˈteniəl/ especially American English) [countable]TMCthe day or year exactly 100 years after a particular eventcentenary ofa concert to mark the centenary of the composer’s birth